Updating using explicit cursors

04-Jul-2016 17:15 by 9 Comments

Updating using explicit cursors

You can use these attributes in PL/SQL statements like functions but you cannot use then within SQL statements.Oracle creates a memory area, known as context area, for processing an SQL statement, which contains all information needed for processing the statement, for example, number of rows processed, etc. The set of rows the cursor holds is referred to as the active set.

If the SQL statement returns more than one row, an error will occur.But, cursors seem to be the 'right' way to do things.I can find lots of information on what cursors are and different ways to loop through them, but I can't find a solid reason why to use them over regular FOR loops. Are there inherent advantages I should be aware of? I tend to use 'real' cursors only if I have to step backwards, not just forwards. A cursor holds the rows (one or more) returned by a SQL statement.You can name a cursor so that it could be referred to in a program to fetch and process the rows returned by the SQL statement, one at a time.Implicit cursors Implicit cursors are automatically created and used by Oracle every time you issue a Select statement in PL/SQL.

If you use an implicit cursor, Oracle will perform the open, fetches, and close for you automatically.

The process of an implicit cursor is as follows: The implicit cursor is used to process INSERT, UPDATE, DELETE, and SELECT INTO statements.

Oracle automatically performs the OPEN, FETCH, and CLOSE operations, during the processing of an implicit cursor.

The Oracle server implicitly opens a cursor to process each SQL statement not associated with an explicitly declared cursor.

PL/SQL allows you to refer to the most recent implicit cursor as the SQL cursor.

For a long time there have been debates over the relative merits of implicit cursors and explicit cursors.

  1. Free adult chat canada no regestration 22-Feb-2015 01:52

    free chat now , chat no register , free text chat , Chat random , Singles chat , Nickname , Age , Sex ( Male / Female ) , Country and State.

  2. apdating com 18-Feb-2016 19:07

    Other fraternities are also called literary societies because they focus on the literary aspect of the organization and its role in improving public speaking.

  3. Chat bots with naughty pictures 09-Nov-2015 00:25

    Nude girls from quincy illinois Escort girls in fife Sexy single women in graysville Girls in polar bluff nude Arizona cougar dating Wife swap st louis area Black cheating wives in Swingers in claiborne county Horny women in germantown Swingers club in newport news Aduit fuck buddy toledo ohio Swingers in ct watch Swingers in des moines Crown point in swingers Sex personals for mentor ohio Horny woman saticfying there Dating club for middle Oakfield wi real swingers Naked woman in the city Swinger bi lick pussy All dating seeking for faceclub Portland swingers Women to fuck in atchison Senior dating clubs etc White girls in kansas naked Were can i place sex Hot girls from canton Passionate wife swapping Circumcised men seeking woman Redhead women in springfield Women for ass sex personal Women fuck buddies in east Where to find horney girls Naked women in labour room Camarillo swining singles Ladies seeking casual Rapid city horney girl hang Hot women in parker az to fuck Showing the fucking of women Topless girls from wyoming Swingers campgrounds in Female swinger mail order bride Girls from mwmphis tn naked Meet all the horny girls Fuckslut personal Alberta fuck buddies Places to find women in who Naked women in stuttgart Nude girl from livingston Fucking milfs in palmdale Washigton state swingers Phone sex talk with girls in Swf no strings attached Sex chat with girls in conway Oral real rap talk, sexy southern california swinger with long legs pic that will come to ur door. People women sex photo swap in janesville wi naked women hayri pusy.

  4. table for six dating 16-Nov-2016 00:20

    Explore your interests, rediscover your hobbies and find someone special with Love Begins At.